One thing people do not think of. California is a car centered state. They have cars from all ages running as daily drivers. Even the ones with open crank case ventilation. This leaves a oily trail on all the roads and when it mixes with rain it can be as bad as ice. And Californians have no idea how to drive that way.
Thank God there aren't many vehicles runnin' 'round on the roads here that still have Road Draft Tubes !
PCV has been required in Ca since the 1961 model year ( 1962 federal ) ; it was originally called "CCV" ( Crank Case Ventilator ), and was different from PCV (
Positive Crankcase Ventilator ) , as it was an "open" system , whereas PCV is a "closed" system .
I believe that 1966 was the first model year for PCV , as A.I.R. Pumps were introduced .
Many of the old(er) freeways / expressways still have their original cement surface , which consisted of a grooved surface ; all south west states had this style originally . This was done in order to help the oils and whatnot wash-off via these grooves .
It's
not fun driving a vehicle with bias-ply tyres on these grooved roads !
There was a time when there existed "California" tyres , and "49 State" tyres , especially on motorcycles .
So , many of the old(er) vehicles seen are by-and-large powered by more-contemporary motors , replete with PCV .
Good point about 99% of drivers here : can't drive on
dry pavement , let alone
wet pavement !
As far as the amount of vehicles on our ( worn out , beat-up , unmaintained ) roads : 20lbs of **** , in a 5lb bag !
